Debian DSA-2053-1 : linux-2.6 - privilege escalation/denial of service/information leak
High Nessus Plugin ID 46725
SynopsisThe remote Debian host is missing a security-related update.
DescriptionSeveral vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or privilege escalation. The Common Vulnerabilities and Exposures project identifies the following problems :
- CVE-2009-4537 Fabian Yamaguchi reported a missing check for Ethernet frames larger than the MTU in the r8169 driver. This may allow users on the local network to crash a system, resulting in a denial of service.
- CVE-2010-0727 Sachin Prabhu reported an issue in the GFS2 filesystem.
Local users can trigger a BUG() altering the permissions on a locked file, resulting in a denial of service.
- CVE-2010-1083 Linus Torvalds reported an issue in the USB subsystem, which may allow local users to obtain portions of sensitive kernel memory.
- CVE-2010-1084 Neil Brown reported an issue in the Bluetooth subsystem that may permit remote attackers to overwrite memory through the creation of large numbers of sockets, resulting in a denial of service.
- CVE-2010-1086 Ang Way Chuang reported an issue in the DVB subsystem for Digital TV adapters. By creating a specially-encoded MPEG2-TS frame, a remote attacker could cause the receiver to enter an endless loop, resulting in a denial of service.
- CVE-2010-1087 Trond Myklebust reported an issue in the NFS filesystem.
A local user may cause an oops by sending a fatal signal during a file truncation operation, resulting in a denial of service.
- CVE-2010-1088 Al Viro reported an issue where automount symlinks may not be followed when LOOKUP_FOLLOW is not set. This has an unknown security impact.
- CVE-2010-1162 Catalin Marinas reported an issue in the tty subsystem that allows local attackers to cause a kernel memory leak, possibly resulting in a denial of service.
- CVE-2010-1173 Chris Guo from Nokia China and Jukka Taimisto and Olli Jarva from Codenomicon Ltd reported an issue in the SCTP subsystem that allows a remote attacker to cause a denial of service using a malformed init package.
- CVE-2010-1187 Neil Hormon reported an issue in the TIPC subsystem.
Local users can cause a denial of service by way of a NULL pointer dereference by sending datagrams through AF_TIPC before entering network mode.
- CVE-2010-1437 Toshiyuki Okajima reported a race condition in the keyring subsystem. Local users can cause memory corruption via keyctl commands that access a keyring in the process of being deleted, resulting in a denial of service.
- CVE-2010-1446 Wufei reported an issue with kgdb on the PowerPC architecture, allowing local users to write to kernel memory. Note: this issue does not affect binary kernels provided by Debian. The fix is provided for the benefit of users who build their own kernels from Debian source.
- CVE-2010-1451 Brad Spengler reported an issue on the SPARC architecture that allows local users to execute non-executable pages.
This update also includes fixes a regression introduced by a previous update. See the referenced Debian bug page for details.
SolutionUpgrade the linux-2.6 and user-mode-linux packages.
For the stable distribution (lenny), these problems have been fixed in version 2.6.26-22lenny1.
The user-mode-linux source package was additional rebuilt for compatibility to take advantage of this update. The updated version of the package is 2.6.26-1um-2+22lenny1.